Having fun with code igniter

Have fun with
CodeIgniter Framework
23 April 2016
& Ahmad Arif

About Me
 Pendidikan
 1998-2004 SDN 1 Kertamulya, Karawang
 2004-2007 SMPN 2 Rengasdengklok, Karawang
 2007-2010 SMAN 1 Rengasdengklok, Karawang
 2010-2014 Informatika Universitas Jenderal Achman Yani
 2015-???? Informatika Institut Teknologi Bandung
 Minat
 Programming
 Machine Learning
 Artificial Intelligent
 Game Technology
 Entertainment
 Etc

What is framework?
 Framework = Kerangka kerja
 Menyediakan struktur umum aplikasi sehingga
memudahkan pengembang dalam menyimpan kode
dalam aplikasi
 Menangani tugas umum
– Database
– Business logic
– Form handling

What is CodeIgniter?
 CodeIgniter framework aplikasi web ringan yang ditulis
dalam bahasa pemrograman PHP, dan mengadopsi
pendekatan Model-View-Controller.

Kenapa menggunakan CodeIgniter?
 Feature rich
 Lightweight/small
 Open source
 Well-supported by an active community
 Excellent “by example” documentation
 Easy to configure (nearly zero configuration)
 Supports multiple databases
 Cleaner code
 High Performance
https://github.com/kenjis/php-framework-benchmark

Model-View-Controller
 Model – merepresentasikan data
 View – menyajikan data untuk interaksi dengan user
 Controller – mengontrol model dan data supaya bisa
saling berinteraksi

CodeIgniter Classes
 CI’s built-in classes berisi fungsi dasar yang sering
digunakan oleh aplikasi web
 Beberapa kelas yang sering digunakan:
– Database
– Input
– Loader
– URI
– Validation

Database Class
 Mengolah queri menggunakan the Active Record / ORM
Pattern
 Menyediakan metode “chaining” untuk kemudahan query
 $this->db->where(‘name’,$name);

Input Class
 Menyediakan akses ke input pengguna dan data lainnya:
– Form fields (POST)
– Cookies
– Server variables
 $this->input->post(‘fieldname’);

Loader Class
 Membuat berbagai resource:
– Databases
– Views
– Helpers
– Plugins
 $this->load->view(‘viewname’);

URI Class
 Menyediakan akses ke bagian-bagian tertentu dari String
URI
 Berguna untuk membangung RESTful API
 $this->uri->segment(n);

Other Classes
 Benchmarking
 Calendaring
 Email
 Encryption
 File uploading
 FTP
 HTML Table
 Image Manipulation
 Language
(internationalization)
 Output
 Pagination
 Session
 Trackback
 Unit testing
 XML-RPC
 Zip encoding

Helpers and Plugins
 CodeIgniter dilengkapi dengan berbagai “helper” yaitu
fungsi yang menambahkan kenyamanan terhadap
aplikasi dan memberikan kemudahan reuse code.
 $this->load->helper(‘helper_name’);
 CodeIgniter juga memungkinkan untuk penggunaan
kustom add-on yang disebut “plugins”.
 $this->load->plugin(‘plugin_name’);

Getting Started
 Tools
– Apache HTTP Server
– MySQL Database
– PHP
– Browser
– Code Editor
XAMP, WAMP, MAMP, LAMPP
 Notepad
 Notepad++
 Sublime
 Atom
 PHP Storm
 Etc

Getting Started
 To Do List
– Installation
– Controller
– View
– Model
– RESTful API

Controller
<?php
class BlogController extends CI_Controller {
public function index() {
echo 'Hello World!';
}
public function comments() {
echo 'Look at this!';
}
}
<?php
…
public function page($index) {
echo 'Page: !' . $index;
}
}

View
<html>
<head>
<title>My Blog</title>
</head>
<body>
<h1>Welcome to my Blog!<h1>
</body>
</html>
index.php
$this->load->view(“index”);
Add this code in controller

View
<html>
<head>
<title>My Blog</title>
</head>
<body>
Welcome <strong><?php echo $name ?><strong>
</body>
</html>
index.php
$data = array(
“name” => “Ahmad Arif”
);
$this->load->view(“index”, $data);
Add this code in controller

Model
 Create database and table
 Setting database (config/database.php)

Model
class Blog extends CI_Model {
$tableName = “blog”;
public function insert($title, $content){
$data = array(
“title” => $title,
“content” => $content
);
$this->db->insert($this->tableName, $data);
}
}

Model
...
public function update($id, $title, $content){
$data = array(
“title” => $title,
“content” => $content
);
$this->db->where(“id”, $id);
$this->db->update($this->tableName, $data);
}
}

Model
...
public function delete($id){
$this->db->delete($this->tableName);
}
}

Model
...
public function getAll(){
return $this->db->get($this->tableName)->result();
}
public function getById($id){
return $this->db->get($this->tableName)->row();
}
}

Using Model
...
public function insert(){
$this->load->model(“Blog”);
$title = $this->input->post(“title”);
$content = $this->input->post(“content”);
$this->Blog->insert($title, $content);
}
}

RESTful API
 Tools
– Postman
– Code Editor
 To Do List
– Format JSON/XML
– Routing
– Cache setting

References
 https://codeigniter.com
 https://google.com
 https://github.com/ahmadarif

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